No, not a sub
The hair band movement was still in full swing in 1990 and this band jumped right in on the tail end of the era. The self titled Firehouse CD was released in 1990 and today's lost hit "Don't Treat Me Bad" was the second single released and got plenty of air play. The song was a staple of radio station WWBZ The Blaze here in Chicago. "Don't Treat Me Bad" rose to #19 on the Hot 100 in 1991 and is on my all time Top 20 favorite songs.
Oh... and the video is pretty HOT!